| Value | Category | Cases | |
|---|---|---|---|
| 0 | no prior child | 3398 |
26.3%
|
| 1 | 6567 |
50.8%
|
|
| 2 | 2403 |
18.6%
|
|
| 3 | 481 |
3.7%
|
|
| 4 | 63 |
0.5%
|
|
| 5 | 3 |
0%
|